Welcome to my astronomy blog, I dedicate myself to the simplest form of amateur astronomy which requires only portable equipments.

Friday, March 02, 2012

2012-03-02 Very brief sunny period

The sun finally comes out with poor seeing. Thin cloud floating
around and the high humidity is no fun at all. When I pulled out the
solar filter after observation, I can see a thin layer of moisture on
the corrector of my Maksutov.

Despite the poor weather,
I really want to try out my Maksutov with Baader 3.8, centering the
target is not too hard and I managed to do it even at 3000mm and
focusing is okay as well even without using a motor.

This is taken at prime focus, i.e. 1500mm focal length at around f/11. Given a green filter, shutter speed keeps fast and it's good to freeze seeing. I've also tried to do at 3000mm but then the seeing was just too bad to give any detail, even accurate focusing is impossible. I shall try again whenever I have chance, see if I can get something with white light.